Filter Products
Additives & Beneficials
Hydro Base Nutrients
Soil Base Nutrients
Foliar Sprays
Organic Base Nutrients
Organic Additives
Starter Pack
Product Categories
Page / Product Options
Display List Grid
Sort By:
Latest Products in Humboltd
Royal Flush Myco Maximum Myco Madness Verde Honey Hydro Sticky Big Up Powder Flavorful Hum-Bolt Structural Integrity
Oneness Humboldt
Through extensive research and development, the Humboldt Nutrients teams of agronomists and chemists have created this premium One-part formula. Oneness contains a unique proprietary combination of macro and micro nutrients which cannot be found in competing One-part formulas. Oneness protects your garden from nutrient lock-out and salt build-up. Oneness is used as a food source by both plants and microorganisms. Oneness can help assure that your fruits, vegetables and herbs receive adequate nutrition without draining your bank account.
Oneness Kit Humboldt
This basic starter kit contains the primary Oneness nutrient solution as well as three primary additives a gardener will need to build a good foundation for growth. Contains: Humboldt Oneness 946ml Humboldt Ginormous 946ml Humboldt Sea Cal 473ml Humboldt White Widow 28.5g Humboldt Honey 473ml
Master A+B Humboldt
Humboldt Nutrients Master A is the highly concentrated Nitrogen, Potassium/Calcium and micro nutrients containing formula for use primarily in the growing phase when used in conjunction with Master B. For use in any growing medium. Humboldt Nutrients Master B is the highly concentrated Phosphorus, Potassium and Magnesium containing formula for use primarily in the flowering phase when used in conjunction with Master A. For use in any growing medium. Humboldt Nutrients has formulated this vigorous 2-part nutrient solution for use on any...
Master A+B Kit Humboldt
A premium two-part basic starter kit that provides the core nutrients in Humboldt's Master A and B schedule, with the addition of two key products for successful gardening. Contains: Humboldt Master A 946ml Humboldt Master B 946ml Humboldt Sea Cal 473ml Humboldt Ginormous 946ml Humboldt White Widow 28.5g
Grow Natural Humboldt
Humboldt Nutrients Grow Natural is an ultra-concentrated organic, natural grow formula designed to give your Soil grown plants the nutrient-rich foundations needed during the vegetation and flowering period. Used in conjunction with Bloom Natural and DeuceDeuce, Grow Natural can help your plants to reach their full potential. Grow Natural is made using fresh ingredients; none of our products are imported from overseas making our prices affordable to the consumer. Naturally derived, our Grow Natural is a blend of ocean fish, seaweed...
Bloom Natural Humboldt
Humboldt Nutrients Bloom Natural is an ultra-concentrated organic, natural bloom formula designed to give your Soil grown plants the large phosphorus and calcium boost needed during the flowering period. Using Bloom Natural in conjunction with Grow Natural and DeuceDeuce can allow your plants to reach their full potential. Bloom Natural induces a superb flowering response in all plants, encouraging multiple flowering sites. This can produce a massive crop, a high quality yield and flavorful fruits. Derived from Soft Rock Phosphate and...
Mayan MicroZyme Humboldt
Mayan MicroZyme is a bacterial-enzymatic concentrate full of microorganisms that can increase fertility while providing vital nutrients to all types of plants and crops. The micro-organisms present in Mayan MicroZyme (MMZ) mineralize nutrients, produce and regulate nitrogen, build organic matter in your soil, and can improve fertility and fruit yields by increasing nutrient uptake and availability. The micro-organisms in Mayan MicroZyme are dormant with a long shelf life because of the micro-encapsulating solution. When the concentrate is...
ProZyme Humboldt
ProZyme is an enzymatic treatment for growing mediums. Enzymes are biological catalysts, derived from living organisms, and catalysts increase the speed of naturally occurring chemical reactions. ProZyme is a concentrate, made up of over 80 different beneficial enzymes. Humboldt Nutrients employs the foremost experts in horticultural enzymes to formulate ProZyme into a highly diverse blend of enzymatic compounds. The result is a rich, dark biological which will break down dead root mass, starches, and nutrients to make them readily...
Roots Humboldt
Humboldt Roots is a highly concentrated organic root stimulant that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of their plants. A large yield is directly related to a plant’s metabolism rates, and plant metabolism rates are directly related to their root zones’ uptake of nutrients and fertilizers. Humboldt Roots was specifically designed to expand the root zone, resulting in larger yields through increased...
White Widow Humboldt
Mycorrhizal inoculants are crucial to sustaining a healthy, expansive root zone. Humboldt Nutrients is proud to launch our newest and most powerful soluble mycorrhizal, White Widow. White Widow is a mycorrhizal powder containing mycological spores. White Widow is a diverse, pure endomycorrhizal. The effectiveness of a soluble mycorrhizal inoculant relies heavily on two variables: the amount of spores in the product itself and the ability of that product to become soluble in water. White Widow is a super-fine powder which quickly and easily...
Hydro Deuce Humboldt
Similar to DeuceDeuce but not as thick, making it available for use with run-to-waste and recirculating hydroponic systems. Used in the late flowering stages.
Sea Cal Humboldt
Humboldt Nutrients Sea Cal was designed in Humboldt County to be a powerful additive for hydroponics and all growing mediums. Sea Cal may be utilized for any type of vegetable, flower or herb. Sea Cal is a concentrated growth enhancer and calcium supplement that offers vital nitrogen and calcium in the ratios which are beneficial during early plant development. Calcium is very important during a plant’s vegetative and flowering cycle, controlling aspects of cell wall structure and permeability. Calcium is absorbed into a plant through the...
Sea Mag Humboldt
Humboldt Nutrients Sea Mag was designed in Humboldt County to be a powerful additive for hydroponics and all growing mediums. Sea Mag may be utilized for any type of vegetable, flower or herb. Sea Mag is loaded with vital elements which help control cell division, cell growth, cell differentiation and various internal processes. Sea Mag can be used to supplement magnesium and to increase plant growth. Sea Mag supplies crucial elements that plants require, preventing and correcting potential nutrient deficiencies. Sea Mag has been...
Equilibrium Humboldt
If you want to reap a large bountiful harvest your plants must receive the correct ratio of Calcium to Magnesium throughout their life cycle; but for that harvest to be flavorful, sweet and aromatic, one must ensure that the Ca and Mg you are feeding your garden is derived from high quality source materials. With Equilibrium Natural, Humboldt Nutrients offers the ease of a one part Ca-Mg additive with the quality that has come to be associated with our products. Try Equilibrium Natural today and see the difference it makes in your normal...
Structural Integrity Humboldt
Silicate is one important element most soils lack. Using Potassium Silicate for your garden protects plants from high salinity, pests, molds, and transpiration in higher temperatures.  SI enhances the plant immunity mechanism by entering the plant cell walls. SI is essential to the leaf and stem strength and allowing the plant to hold up heavier fruits. High silicate content in plant tissue enables the leaves to be held erect which allows more light to penetrate to the lower level of the canopy. In order for this to occur the SI needs to...
Hum-Bolt Humboldt
HUM-BOLT is a 8% humic acid derived from premium Leonardite, extracted from a mine known to produce the highest quality shale. Humic acid promotes high ion exchange capabilities, stimulates plant enzymes, increases beneficial organisms and acts as an organic catalyst. For years humic acid has been largely absent from our soil, due to erosion and over-farming. Thankfully, recent research has proven long-stated claims about humic acid’s benefits, which gardeners, farmers, and health experts have known for generations. Used in conjunction...
Flavorful Humboldt
FlavorFul is a strong solution of 8% refined Humic acid concentrate, a little known and highly useful additive. The majority of refined Humic acid formulas on the market are .01% concentration. The clear appearance of these watered down derivatives is an indication of the low concentration. FlavorFul is 8% refined Humic acid with a dark rich color, indicating the high concentration. FlavorFul is comprised of long chains of organic carboxyl and polyhydroxide acids. This complex molecule is very active with many open rings, giving it a large...
Big Up Powder Humboldt
A local legend in Humboldt County: Big Up Powder is a premium bloom booster. Humboldt Nutrients agronomists and chemists have developed Big Up Powder after years of research and local trials. Many similar products contain artificial coloring and dyes, but Big Up Powder is free of all of these unnecessary ingredients. For use in any growing medium. Big Up Powder is designed specifically for the first week and final weeks of the flowering period. Plants are in a transitional phase during this first week. By introducing Big Up Powder in the...
Sticky Humboldt
Foliar sprays are an easy way to ensure the quality of your fruits and flowers in all your favorite plants. A proper foliar spray should include a wetting and binding agent to equally distribute and adhere the spray onto the plant’s leaves. Humboldt Sticky is a premium sticking and wetting agent that has been extensively tested in Northern California with phenomenal results. Humboldt Sticky is formulated using premium ingredients which are simply unavailable in similar products. Stomata are tiny plant organelles which are located on...
Honey Hydro Humboldt
Humboldt Honey Hydro is an excellent sweetener for all gardens. It promotes and facilitates the growth of beneficial bacteria and fungi in soil-less media, and dramatically enhances the quality of any plant’s fruit. For use in any Hydroponic system. Sugars are the fuel of the microscopic world, supplying the energy needed to drive biochemical systems. Our Humboldt Honey Hydro breaks down into the smallest possible sugars when dissolved in water, creating an easily accessible food for beneficial fungus, bacteria, and plants. Humboldt...
Verde Humboldt
It’s Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth catalyst for hydroponic or soil crops, Verde can help keep plants healthy throughout their life cycle. Verde is a premium growth supplement with 16% nitrogen, 1% available phosphorus, and 2% potassium, as well as iron, magnesium and other vital elements. This is a great blend for plants experiencing periods of accelerated growth. Some competing nutrient lines offer a (16-0-0) formula as a one-part grow...
Myco Madness Humboldt
Myco Madness is a soluble powder which contains a biologically active package: 9 mycorrhizal species, 15 beneficial bacteria and 2 trichoderma species well-suited to a variety of media, soil conditions, climates and plants. Myco Madness contains mycorrhizal fungi that colonize plant roots and extend the root system into the surrounding media, greatly enhancing the absorptive surface area of root systems. Myco Madness can help in forming an essential link between the plant roots, organic matter and fertilizers of all types. Myco Madness can...
Myco Maximum Humboldt
Myco Maximum is a granular powder containing 7 species of growth-enhancing mycorrhizal fungi, proprietary ingredients, 11 strains of beneficial bacteria, and 2 trichoderma species. Myco Maximum adds organic matter and helps to break down nutrients and micro-nutrients present in your growing medium or soil which are necessary for plants throughout their life cycles. Mycorrhizal fungi increase the surface-absorbing area of the roots, greatly improving the ability of plants to grow, fruit and flower by forming an intricate web that captures...
Royal Flush Humboldt
Try Humboldt Nutrients Royal Flush today and experience the difference between a flush and a Royal Flush with a clean, sweet finish. For use in any growing medium. Royal Flush can be applied to all crops including vegetable crops, row crops, field crops, trees, vines, ornamentals, and gardens and landscaping. Royal Flush is a salt-eliminating, finishing solution for all plants growing in soil, potting mixes, soil-less rooting media, hydroponics and other gardens. Royal Flush can be used by the indoor and outdoor home gardener for all...

Our sole purpose is the customer. Humboldt Nutrients strives everyday to create the highest quality products, at the most affordable prices, with the easiest application. Like a craft brewer or a award winning chef, we want to give our customers the best possible nutrient blend that we know how to create. Using all small batch processess, we are able to scrutinize and control our inputs, using only the best quality materials.

We want to personally thank all of our devoted Humboldt Nutrients customers for their support and valuable feedback. In the future, Humboldt Nutrients will continue to enlist our all-star R&D team to scour the planet for any and all improvements or developments in agronomy, chemistry, and mycology. We are constantly looking for ways to improve our product selection for our growing customer base.

Most importantly we want you to enjoy the process of growing plants and cultivating a garden. There is no substitute for the pride one feels after raising up a delicious crop of fruits and vegetables, or a beautiful and aromatic crop of flowers.

Humboldt Feed Schedule


[ Download Humboldt Feed Schedule ]



View: Mobile - Full Site